title: Treatment of hypogonadotropic hypogonadal male patients with the luteinizing hormone-relasing hormone (LH-RH) anolog D-Ser(TBU)6 EA10 LH-RH: transient disappearance of gonadotropin stimulation.
abstract: We have studied the effect of prolonged treatment with a long-acting luteinizing hormone-releasing hormone (LH-RH) analog (D-Ser-(TBU)6 EA10 LH-RH in six patients with isolated gonadotropin deficiency. Before treatment, all subjects responded to LH-RH (100 microgram intravenously [IV]); one responded immediately, and five after 5 daily infusions of LH-RH (200 microgram). Treatment by LH-RH analog (348 microgram every 2 days with a nasal spray for 90 or 120 days) is only efficient for 1 month; a consistent increase in serum LH and a slight increase in testosterone (T) were observed in all patients, but no increase of serum follicle-stimulating hormone (FSH) was detectable. Then a paradoxical effect appeared: LH and T levels returned to the basal values. Moreover, this treatment induced refractoriness of the pituitary to LH-RH for several months after the end of treatment. The appearance of antibodies to LH-RH and LH-RH analog was eliminated. A pituitary response was obtained in three patients when a new LH-RH stimulation was repeated 7 and 11 months after the end of treatment. The mechanism of this pituitary desensitization is discussed.
mesh_terms: D000293:Adolescent; D000328:Adult; D000906:Antibodies / Q000032:analysis; D002064:Buserelin; D006063:Chorionic Gonadotropin / Q000008:administration & dosage; D004334:Drug Administration Schedule; D005640:Follicle Stimulating Hormone / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000276:immunology / Q000627:therapeutic use; D006801:Humans; D007006:Hypogonadism / Q000097:blood / Q000188:drug therapy*; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D010902:Pituitary Gland / Q000187:drug effects* / Q000502:physiology; D013268:Stimulation, Chemical; D013739:Testosterone / Q000097:blood
chemical_list: D000906:Antibodies; D006063:Chorionic Gonadotropin; D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D002064:Buserelin